Centrifugal cream-separator.



N0. 637,758." Patented Nov. 28, |899. J. H. AYERS.

GENTRIFUGAL -CREAM SEPARATUR.

(Appucmun med Feb. 20, 1899.)

(Nn Model.)

[n1/en llorY mamme.. 1v/sumaron D c UNITED STATES PATENT OFFICE.

JOHN H. VAYERS, OF LANSING, MICHIGAN.

CENTRIFUGAL CREAM-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 637,7 58, dated November 28, 1899. Application filed February 20, 1899. Serial No. 706,116. (No model.)

To @LZ whom it may concern:

Be it known that I, JOHN H. AYERS, a citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, have invented a new and useful Improvement in Separator-Bowls for Centrifugal Separators, of which the following is a speciication.

My invention relates to the top or cover of the bowl, and is designed to make a device that will not be thrown out of balance by informing, when the inner cover is in position, tubes through which the skim-milk passes from the peripheral portion of the bowl to the skim-milk, groove K, from which it escapes at the skim-milk vents E.

At the top of the exterior cover is formed a solid ring of metal e', in the inner face of which is cut a milk groove or reservoir K of considerable depth, out of which open the skim-milk vents E. The lower part of the ring e below the grooveK is cut away, so as correct adj ustment,that will be easily cleaned, and that will facilitate the rapid and efficient separation of the milk and cream and their egress from the bowl. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a vertical section of the bowl, showin g all the parts in their proper relation to each other. Fig. 2 is a View of the internal cover, showing the milk-channels, neck, and cream ring and escape. Fig. 3 is a crosssection of the upper part ofthe neck of the inner cover, showing the construction of the cream-ring. Fig. 4 is a cross-section of the cover of the bowl along the line l 2. Fig. 5 is an enlarged section of the top portion of the cover to exhibit the details of construction more clearly.

Similar letters refer to similar parts throughout the several views.

The bowl f is of the ordinary construction, being cylindrical in shape. In the bottom is iirmly fixed the driving-shaft g.

The cover of the bowl is conical in shape and is composed of two parts-an exterior e and an interior d. The former is screwed firmly to the main body of the bowl, and the groove, into which the rubber ring i is placed,

at a point just beyond the inner margin of the bowl f, as shown in Fig. l, and at the other with the skim-milk passage F, thus to form an annular passage F, connecting the milk-channels G with the groove K. The purpose of the groove K is to prevent leakage between the ring e and the neck of the interior cover, which it does in a manner more fully described hereinafter.

The cream-regulating ring A is fitted closely into the top of the neck of the interior cover d. y The lowerpart of the interior Wall of this ring is cut away, forming au eccentric recess or space c, through the walls of which are cut a number of cream-vents B, B', B, B", and B".

An opening D is made through the wall of the neck of the interior cover d, with which the creamvents B B', dre., can be brought into line by revolving the cream-ring A. The space c is arranged eccentrically with reference to the axis of the bowl in order to regulate the escape of cream from the bowl in a manner hereinafter more fully set forth.

The drawings show vanes b attached to the central tube for the purpose of steadying the cream in the cream-pool; but these vanes form no part of my present invention.

In operation the full milk is admitted through the central tube a., which its closely at the top into the central opening in the cream-ring A. Passing downward it escapes into the bowl at the bottom under the funnelshaped expansion of the central tube h into the main body of the bowl, where the cream and milk are separated. The skim-milk being heavier takes its place close to the periphery of the bowl, 'and the lighter cream at the center around the tube a. The skim-milk passes up to the top of the bowl and is thrown by the centrifugal force into the groove at the bottom of the interior cover d and thence, as already stated, it `passes through the channels G and the skim-milk space F into the IOO skim-milk groove K, in which it flies at once to theexterior wall or periphery of the groove,`

` neck of the interior cover entirely liquidtight, since any escape of liquid at this point gal force. Y The escape of cream between the' cream-ring A-and the tube a is prevented in 1o the same manner. The cream passes up along tion of the centrifugal force eiectually prevents any escape of cream between the central tube a and the cream-ring A, and the joint between the cream-ring and the neck of the interior cover is made so close as to prezo vent any leakage of cream at that point.

' Theposition of the cream-regulating ring,-

as shown in Fig. 5, is as it would be usedfordrawing thin cream. If it be desired to' thicken the cream, the ring is revolved until 2 5 one of the other cream-vents, as B', is brought opposite to the open-ing D. The wall A being thicker at this point brings the opening of the cream-vent B' closer to the center, and

thus retards the escapeof cream to some ex- 3o tent, and by this means, and by being nearest to the center where the cream is freest from milk, -efects the desired result. A similar adjustment of the milk-escape may be made bythe ordinarydevice of screw-plugs in the i 3 5 skim-milk vents E.

By constructing the exterior and interior covers in the manner indicated and placing them in complete contact with eachother it without any risk ofthrowing the device out of balance in replacing the parts. It isV also found. in practice that the channels G givevery much more perfect results'than either` an uninterrupted spacebetween the exterior and interior covers or a single tube, as used'- i in other constructions, and the adjustable cream-ring A, with its eccentricallyfarranged space c and the` cream-vents B B,V&c gives much better results than the ordinary device of an adjusting-screw. l

I do not claim, broadly, the use of an exterior andV interior separable cover to the bowl. is preven tedby the operation of the centrifu'- Whatv I claim, and desire to secure by Let# ters Patent, isi Y l1. The combination in a bowl for centrifugal separators ofseparable exterior and inte- Vrior conical covers having the conical surfaces in contact with each-other and a pluraljity of channels formed between said covers,

substantially as described.

` 2. In a bowl for centrifugal separators in combination with separable exterior and interior conical covers having the conical surfaces in contact with each other, the latter having a'cylindrical neck, and a plurality of channels between the covers, of a groove surrounding the neck of theinterior cover and an annular passage smaller in exterior diame ter than said groove connecting the groove and channels. i

3. In a bowl forcentrifugal separators a cream-regulatingringhavingan eccentrically arranged recess'or cream-space.

4. In a bowl for centrifugal separators in combination with the exterior and interior covers to said bowl of a cream-regulating ring having an: eccentrically-arranged recess and a plurality of radial openings into said recess, substantially as described.

5'. A bowl for centrifugal separators having 'separable exterior and interior conical covers in contact with each other, channels between the covers,i and a cream -ring having aneccenv trically-disposed recess. is made possible to separate them for -the proc- Y 4o ess of cleaning with the greatest readinessaud 6. Ina bowl for centrifugal separators in combination, an interior con-ical cover, having channels in its exterior surface and a cylindrical neck ,and a cream-ring having an eccen- 1. trically-disposed recess located in said neck.

. JOHN H. AYERS. i Witnesses:

C. C. WOOD, ETTA H. GARDINE. 

